Lost Ark Error 10010 Lost Ark

Fixed: Lost Ark “Server Authentication Failed” (10010)

If you are familiar with the Lost Ark game, you will agree that it has not seen the best of launches in recent times. In fact, one of the recent errors interfering with many players’ games is the “server authentication failed” error 10010. 

While there is no definite fix to the problem, a few troubleshooting steps have worked for our team, which we outlined here:

What is the Lost Ark Error 10010?

The Lost Ark error 10010 happens when you’re trying to log in to the game’s server. This can happen for a number of reasons, from missing game files or local files, antivirus or Firewall issues, internet speed, etc. 

Lost Ark Error 10010

Regardless of the reason, there are working solutions, which are as follows: 

How to Fix the Server Authentication Failed Error 10010 in Lost Ark: 12 Surefire Ways

Fix #1: Check Your Internet Speed

One of the issues when connecting to the game server is internet speed. If your internet connection is not up to par, you will have issues, such as “server authentication failed” or “Cannot connect to the server. Exiting the game” Lost Ark error, when joining the game server. The best and most acceptable internet speed is 1.5MBps. 

checking internet speed

If your internet speed is below this number, it might not connect to the server network.

Fix #2: Play Using Mobile Internet

The problem might be with your network connection. This hack works mainly for server and authentication issues. 

You might run into this error because your ISP has issues connecting to the server. The best way to solve this problem is to switch your ISP. If this doesn’t work, try to use your mobile network to connect to the server.

Fix #3: Verify Integrity of Steam Files

Another effective solution is to verify the integrity of your game files. The best way to go about this is to follow these steps:

Lost Ark Steam verify integrity of game files
  1. Launch Steam.
  2. From the Steam library section, right click on Lost Ark and select Properties from the Menu.
  3. Click on Local Files tab, then hit “verify the integrity of game files.”

Fix #4: Disable IPv6 (Internet Protocol Version 6) on Windows

To disable IPV6, all you have to do is go to the control panel using Ctrl+X. From the control panel, open Network and Internet, then Network and Sharing Center. 

After, select Change Adapter Settings. Right click on Connections to go to Properties. After this, you can uncheck the box to disable IPV6. Alternatively, you can go through the Windows settings.

Fix #5: Use Command Prompt and Flush DNS

From the start menu, type cmd, and press enter key. On the command prompt query box, type “ipconfig/flushdns.” 

cmd prompt flush DNS

After this, you will receive a message that you have successfully flushed out your DNS.

Fix #6: Deactivate Your Antivirus or Firewall

Your antivirus software could also be another reason you are receiving the authentication failed error. Make sure to disable it, including your Windows Defender Firewall.

Fix #7: Link or Unlink Your Amazon and Steam Accounts for Lost Ark

Another working solution to fix Lost Ark server issues is to link or unlink your Amazon or Steam accounts for Lost Ark. You can follow these steps:

How to Link your Amazon and Steam Accounts for Lost Ark

  1. On your Amazon account, go to Settings.
  2. Select Link Your Steam Account
  3. Log in with the Steam credentials of the account you want to link.
Amazon Lost Ark Support

How to Unlink Amazon and Steam Accounts

The process of unlinking is somewhat similar to linking. 

  1. On your Amazon Games account, go to Account Settings.
  2. Click on the Unlink Account option (Steam and Amazon accounts). 

Fix #8: Run Steam as Administrator

Insights from Lost Ark forums and communities confirm that running Steam as administrator on your PC will solve this problem. All you have to do is right click on Steam and click on Run as Administrator. 

Fix #9: Use or Disable Your VPN

Another reason why the Error 10010 keeps popping up is due to the use of VPN on your PC. If you run into this error, the best thing is to disable the VPN or get a dedicated IP. 

use VPN

The reason is that VPN places several users on one IP, thus triggering the game to end leading to server error.

Fix #10: Edit the Title Multiplayer Region

This solution is a manual configuration of the settings rather than a hack. Sometimes, the server region of your region title may be incorrectly set in the configuration file called “user option.” 

Anytime this happens you cannot play the game, it will get stuck on the title menu.

Fix #11: Try Using Another Steam Account

If any of these solutions we have listed above does not work on your PC, another troubleshooting step is to play the game using a new Steam account. 

logging out of steam account

However, this must be one that has never been part of beta or that you have installed the game on. Also, you can use an alternate account, to ‌play. This method is efficient as our resident gamers have put it to test. 

Fix #12: Reinstall the Game

Another proven way to fix the Lost Ark “server authentication failed” error 10010 is to reinstall the game. 

We believe this will resolve the issue and you should be able to play games without the error. After reinstallation, launch Lost Ark to see if the error has been cleared.  Note that this method has worked for a fair share of players.


There are several reasons you can experience the “server authentication failed” error. However, you can surely overcome this problem with all the fixes we have listed in this guide. They are working and up-to-date, but if the error still persists, you may contact Lost Ark’s support team [1] anytime.

Mathew has nursed a love of video games since childhood. Now, as an adult, he enjoys playing challenging games as much as he enjoys relating with other gamers. Matthew created Hypernia to give gamers like himself accurate and reliable information about games, servers, communication protocols, and much more.

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